the head of japan's liberal democratic party. voters head to the polls this weekend to pick the new parliament. and japan's next government will face a struggling economy and heightened tensions with china and north korea. >>> in london, a mass has just been held at westminster cathedral for the nurse who apparently killed herself after she transferred that prank call from an australian radio station regarding the duchess of cambridge. her family attended the mass. her children say there is now an unfillable void in their lives. she was found hanged last week and her death sparked an international outcry. let's go back now to cnn's ali velshi in newtown, connecticut. >> thanks, victor. as a fact, the tragedy emerged yesterday, 20 parents had some of the hardest news to hear, 20 children killed in a violent shooting spree. we're going to have a look at how it all unfolded, starting with the first call to police and, of course, in about 30 minutes, we are expecting the names of the victims to be announced at a news conference. stay